Entropy production and reheating at the chiral phase transition

被引：15
作者：
Herold, Christoph [1 ]
Kittiratpattana, Apiwit [1 ]
Kobdaj, Chinorat [1 ]
Limphirat, Ayut [1 ]
Yan, Yupeng [1 ]
Nahrgang, Marlene [2 ]
Steinheimer, Jan [3 ]
Bleicher, Marcus [3 ,4 ,5 ,6 ]
机构：
[1] Suranaree Univ Technol, Sch Phys, 111 Univ Ave, Nakhon Ratchasima 30000, Thailand
[2] Univ Nantes, UMR 6457, SUBATECH, IMT Atlant,IN2P3 CNRS, 4 Rue Alfred Kastler, F-44307 Nantes 3, France
[3] Frankfurt Inst Adv Studies, Ruth Moufang Str 1, D-60438 Frankfurt, Germany
[4] Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany
[5] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany
[6] Forschungzentrum Julich, John von Neumann Inst Comp, D-52425 Julich, Germany
来源：
PHYSICS LETTERS B | 2019年 / 790卷
关键词：
Chiral phase transition; Nonequilibrium dynamics; Heavy-ion collisions; COLLISIONS; FLUCTUATION; EVOLUTION; DYNAMICS; POINT; MODEL;
D O I：
10.1016/j.physletb.2019.02.004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the production of entropy in the context of a nonequilibrium chiral phase transition. The dynamical symmetry breaking is modeled by a Langevin equation for the order parameter coupled to the Bjorken dynamics of a quark plasma. We investigate the impact of dissipation and noise on the entropy and explore the possibility of reheating for crossover and first-order phase transitions, depending on the expansion rate of the fluid. The relative increase in S/N is estimated to range from 10% for a crossover to 100% for a first-order phase transition at low beam energies, which could be detected in the pion-to-proton ratio as a function of beam energy. (C) 2019 The Authors. Published by Elsevier B.V.
引用
收藏
页码：557 / 562
页数：6
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